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Pension and Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2018
Compensation And Retirement Disclosure [Abstract] |
Components of Pension and Employee Benefit Expenses | The components of the expense consisted of the following:
(Table only in thousands) |  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Pension plan: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | — |  |  | $ | 101 |  |  | $ | — |  |  | $ | 214 |
Interest cost |  |  | 298 |  |  |  | 329 |  |  |  | 595 |  |  |  | 657 |
Expected return on plan assets |  |  | (378 | ) |  |  | (431 | ) |  |  | (756 | ) |  |  | (861 | )
Amortization of net actuarial loss |  |  | 59 |  |  |  | 57 |  |  |  | 119 |  |  |  | 113 |
Net periodic benefit cost (gain) |  | $ | (21 | ) |  | $ | 56 |  |  | $ | (42 | ) |  | $ | 123 |
Health care plan: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest cost |  | $ | 1 |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | 2 |
Amortization of loss |  |  | 2 |  |  |  | 2 |  |  |  | 4 |  |  |  | 4 |
Net periodic benefit cost |  | $ | 3 |  |  | $ | 3 |  |  | $ | 5 |  |  | $ | 6 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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